package filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginFilter implements Filter {

	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest requ = (HttpServletRequest) arg0;
		HttpServletResponse resp = (HttpServletResponse) arg1;
		HttpSession session = requ.getSession();
		System.out.println(session.getAttribute("u_name"));
		if(session.getAttribute("u_name").equals("")) {
			resp.sendRedirect("login.jsp");
		} else {
			arg2.doFilter(arg0, arg1);
		}
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
	}

}
